Improvement in operating dies for forming articles of metal



raras rtree.

ELI J. MANVILLE, CF VATERBURY, ASSIGNOR TO HIMSELF AND SIDNEY S. CLARK,OF TORRINGTON, CONNECTICUT.

IIvIPROVEIVlENT IN OPERATING DIES FOR FORMING ARTICLES 0F METAL.

Specification forming part of Letters Patent No. 55,1125, dated June 5,lSGG.

To all whom tt 'may concern:

Bc it known that I, ELI JosrAI-I MANVILLE, of Vaterbury, in the countyof New Haven and State of Connecticut, have invented, made, and appliedto use a certain new and useful Improvement in Operating' Dies forForming Articles of Metal; and I do hereby declare the following to be afull, clear, and exact description of my said invention, reference beinghad to the annexed drawings, making part of this specification, wherein-Figure l is a vertical section of my apparatus. Fig. 2 is an elevationofthe same with the plate that holds the dies in place removed. Fig. 3represents a chisel point formed on a round wire by my apparatus, andFig. 4 is a view of a pyramidal or tapering point similarly formed.

Similar marks of reference denote the same parts.

In Letters Patent granted August 9th, 1864, to O. L. Hopson and H. I).Brooks a mode of making round or circular articles of metal by means ofrevolving dies actuated by stationary cams is set forth. The said deviceis not adapted to the forging of prisma-tic, pyramidal, or polygonalarticles in consequence of the motion of the dies around the articlebeing shaped. Dies have been arranged in a radial position and operatedon by a grooved camwheel contiguous to the said dies, the diesthemselves having projections entering said groove 5 but there was noprovisions for adjustment in case of wear.

The nature ofmy saidinvention consists in an adjustable tappet ortappets revolving around and acting upon the outer ends of dies standingradially in a supporting-stock, so as to operate on opposite sides of apiece of metal introduced between such dies, whereby a chisel orbrad-awl point, a nail or pyramidal point, or other shape bounded byplanes or nearly flat surfaces can be produced with great rapidity andprecision, and ofa shape corresponding to the surfaces of the dies.

By this arrangement the power that actuates the dies operates directlyupon the ends of said dies, so that great power can be applied to them,and .the adjustment of the tappets allows for wear.

In thedrawings, et is a die-stock, sustained by the brackets b or othersuitable supports. Within the end ofthis die-stock a transverse recessesare formed for the reception of the dies, which dies can slide in saidstocks toward each other, and radially, or nearly so, to the centerofthe stock af. I have shown four of t-hese dies, they being arranged inpairs c c and Z d. There might, however, be only two dies where thearticle to-be formed only required pressure on two sides, or a largernumber might be employed.

The dies c c d d are retained by a cap-plate, e, with an opening inthemiddle.. Said capplate is removed in Fig. 2.

Around the stock a is a pulley or wheel, f, having said stock for itsgudgeon. This wheel f carries adjustable cams or tappets g, regulated bythe screws h, and the outer ends of the dies o c d d, projectingslightly from the stock a, are acted upon by the tappets as they comearound and pressed together, the respective pairs being acted on insuccession.

The wheel j' may be revolved by a belt or other competent means.

The inner angles of the dies c c d al are beveled, so that the partsthat come in contact as the dies move are inclined planes; hence as thedies c c are pressed together their inclined edges force open the dies dd, and the reverse, thus causing the one pair ot' dies to be removed bythe act of closing the other pair, so that any springs for opening thedies are rendered unnecessary, and the speed of the moving parts is onlylimited by their strength. l

This improvement may -be employed for pointing wire or nails, forgingnails, or for drawing down or reducing prismatic wires or rods, in whichlatter case it will be necessary to form an opening through the centerof the stock a.

1t will be evident that a similar operation would take place if thewheel f remained stationary and the cams c c el d andstock a wererevolved together with the piece of metal to be shaped, but I prefer theconstruction set forth.

What I claim, and desire to secure by Letters Patent, is-

l. Two or more dies fitted to move radially In witness whereof l havehereunto set my in a stock, in eombinationwith an adjustable signaturethis 8th day of August, 1865. tappet or tappets revolving` around thesaid v v stock and acting' directly upon the outer ends ELI J. MANVILL.or edges of said dies, substantially as set forth.

2. Pairs of radial dies formed with their oon- Witnesses tiguous edgesbeveled or at an inclination7 as PETER LAWLOR,

speeied. J oHN ONEILL7 Jr.

